THE HILL — The Food and Drug Administration (FDA) Tuesday gave the green light to a second coronavirus vaccine booster shot for people age 50 and older in an effort to ward off another potential spike in infections due to a subvariant of omicron.

The agency granted emergency use authorization to vaccines from Pfizer and BioNTech as well as from Moderna. Pfizer had initially requested authorization for people aged 65 and older, while Moderna requested broader authorization for all adults.